West Chester, PA
Villanova Station Pedestrian Tunnel
Turn-Key Tunneling, Inc was subcontracted to install 15' dia Pedestrian Tunnel 72 lin using 180" gasket, galvanized, bituminous coated tunnel liner plate utilizing a tunnel shield.
Special conditions: Performed beneath an active AMTRAK railroad per AMTRAK specifications. Excavation limits contained split face of rock and dirt. Mining had to be conducted on a 24-hr basis while beneath the influence line of the tracks. Unanticipated granite bedrock was encountered with an unconfined compressive strength of 22,000 PSI causing Turn-Key Tunneling to make various adjustments to complete the tunnel.